#calculator {
    background: var(--card-bg, #ffffff);
    border-radius: var(--border-radius, 8px);
    box-shadow: var(--card-shadow, 0 2px 4px rgba(0, 0, 0, 0.1));
    padding: 1.5rem;
    margin: 1rem 0;
}

#calculator h2 {
    color: var(--heading-color, #2A395A);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.section-description {
    color: var(--text-color, #4A5568);
    font-size: 0.95rem;
    margin-bottom: 1.2rem;
}

.section-description ul {
    padding-left: 1.5rem;
    margin: 0.8rem 0;
}

.section-description li {
    margin: 0.4rem 0;
}

.input-group {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

#calcInput {
    flex: 1;
    padding: 0.7rem 1rem;
    border: 1px solid var(--border-color, #E2E8F0);
    border-radius: var(--border-radius-sm, 4px);
    font-size: 1rem;
    background: var(--input-bg, #F8FAFC);
}

#calcInput:focus {
    outline: none;
    border-color: var(--primary-color, #2A395A);
    box-shadow: 0 0 0 2px rgba(42, 57, 90, 0.1);
}

#calculate {
    padding: 0.7rem 1.2rem;
    background: var(--primary-color, #2A395A);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm, 4px);
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

#calculate:hover {
    background: var(--primary-dark, #1A2744);
}

#calcDisplay {
    padding: 1rem;
    background: var(--secondary-bg, #F1F5F9);
    border-radius: var(--border-radius-sm, 4px);
    font-size: 1rem;
    color: var(--text-color, #4A5568);
    margin-top: 1rem;
}

#calcResult {
    font-weight: 600;
    color: var(--primary-color, #2A395A);
}